1973-1980 spindle differences?

[Dallasdrifts]

Hey I picked up a used 11 inch roter kit and was told it fits on the spindles for 73- 80 a b e and f body's wondering what the difference would be from my 67 spindles? If there is one

 

[YY1]

73-76 A body and 70-74 E body are the same.

71-79 B body, 76-80 F body and J and M body are 3/8" taller.

Bigblockdart.com has an excellent writeup on the physics and pros and cons of each.

 

[moparmarks]

73 they went to a larger inner bearing.

 

[Dallasdrifts]

Thank you